Houston (IAH) to Louisville (SDF)
Flight time
≈ 2h 23m
Bearing
42° NE
Houston (IAH) to Louisville (SDF) is 788 miles (1,268 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAH–SDF
US DOT T-100 · filed dataIn April 2026, Mesa Airlines operated the most departures, one of 4 carriers flying nonstop IAH–SDF; the Embraer E175 was the most common aircraft at 97% of departures; flights ran 73% full.
Departures
184
April 2026
Seats
13,890
both directions
Passengers
10,136
both directions
Load factor
73.0%
passengers ÷ seats
Who flies IAH–SDF?
Mesa Airlines operated the most nonstop IAH–SDF departures in April 2026 (177), one of 4 carriers on the route.
- YV
Mesa Airlines
177 departures · 12,876 seats
Share of departures96.2%73.7%
Load
- UA
United Airlines
5 departures · 810 seats
Share of departures2.7%65.3%
Load
- AA
American Airlines
1 departures · 128 seats
Share of departures0.5%46.9%
Load
- YX
Republic Airways
1 departures · 76 seats
Share of departures0.5%69.7%
Load
What plane flies IAH–SDF?
In April 2026, the Embraer E175 flew 97% of IAH–SDF departures — more than any other aircraft type.
- Embraer E175
178 departures · 73.7% load
96.7% - Airbus A319
2 departures · 55.5% load
1.1% - Boeing 737-900ER
2 departures · 57.8% load
1.1% - Boeing 737-700
1 departures · 44.4% load
0.5% - Airbus A321neo
1 departures · 92.5% load
0.5%
How has IAH–SDF traffic changed?
Nonstop IAH–SDF departures fell from 195 in May 2025 to 184 in April 2026.
Monthly nonstop IAH–SDF traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
195 departures · 11,571 passengers
71.1%
Load
June 2025
172 departures · 10,809 passengers
84.9%
Load
July 2025
174 departures · 10,772 passengers
84.3%
Load
August 2025
180 departures · 10,090 passengers
75.5%
Load
September 2025
179 departures · 10,754 passengers
81.2%
Load
October 2025
186 departures · 11,202 passengers
81.5%
Load
November 2025
173 departures · 8,808 passengers
69.0%
Load
December 2025
183 departures · 10,629 passengers
78.7%
Load
January 2026
164 departures · 9,088 passengers
74.7%
Load
February 2026
158 departures · 9,350 passengers
81.2%
Load
March 2026
164 departures · 9,181 passengers
76.5%
Load
April 2026
184 departures · 10,136 passengers
73.0%
Load
By direction
The DOT files each direction separately — they rarely match.
IAH → SDF
77.6% full
93 departures · 5,496 passengers
SDF → IAH
68.2% full
91 departures · 4,640 passengers
Nonstop IAH–SDF traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Louisville
US
Louisville Muhammad Ali International Airport
Coordinates
38.17°N, 85.74°W
Hemisphere
N · W
Frequently asked
How far is Houston (IAH) from Louisville (SDF)?
IAH to SDF is 788 miles (1,268 km / 685 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAH to SDF?
A nonstop covers the 788-mile great-circle distance in roughly 2h 23m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAH–SDF?
In April 2026, the Embraer E175 flew the largest share of departures (96.7%), followed by the Airbus A319 (1.1%).
What mileage do I earn flying IAH–SDF?
Distance-based programs credit off the 788-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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